if you are unsure of when to start OPK's.. take a look here!!

To determine when to start testing, you must first know the typical length of your monthly menstrual cycle. The length of the menstrual cycle is the number of days from the first day of menstrual bleeding to the day before bleeding begins on the next period. Most women have about a 28-day cycle, but it varies from person to person. You will need to determine the usual length of the menstrual cycle over the last few months. Most ovulation predictor kits come with a chart to help you decide when to start testing, such as the one below. Also, you can buy ovulation kits in packs of 3-7 kits. You may want to invest in these “value packs,” especially if you are not certain of your cycle length, because you will likely have to test over several days before you get a positive result.

Your Cycle Length = 24 days Day to Begin Testing = Day 8

Your Cycle Length = 25 days Day to Begin Testing = Day 9

Your Cycle Length = 26 days Day to Begin Testing = Day 10

Your Cycle Length = 27 days Day to Begin Testing = Day 11

Your Cycle Length = 28 days Day to Begin Testing = Day 12

Your Cycle Length = 29 days Day to Begin Testing = Day 13

Your Cycle Length = 30 days Day to Begin Testing = Day 14

Your Cycle Length = 31 days Day to Begin Testing = Day 15

Your Cycle Length = 32 days Day to Begin Testing = Day 16

Your Cycle Length = 33 days Day to Begin Testing = Day 17

Your Cycle Length = 34 days Day to Begin Testing = Day 18

Your Cycle Length = 35 days Day to Begin Testing = Day 19

Your Cycle Length = 36 days Day to Begin Testing = Day 20

source from ... wikifaq.com

Message edited 8/6/2008 10:52:00 AM.

Re: if you are unsure of when to start OPK's.. take a look here!!

What do you when your cylce is 50+ DAYS!!!???!!!!

ETA: thank you though for posting this for those it will help. I guess I am just sooo very, very frustrated with my crazy cycles. I can barely chart, let alone do the OPK's. It's frustrating.

Message edited 8/6/2008 3:02:21 PM.

Re: if you are unsure of when to start OPK's.. take a look here!!

i hear ya girl!

my cycles are completely messed up too now.. i dont even know what to go by on that chart! but i figure i post it for the girls.

its so frustrating.. im sorry you are feeling down.. but try and hang in there!!

Re: if you are unsure of when to start OPK's.. take a look here!!

What cracks me up is these days my cycles have been 28 days but I always O on the 10th day, I would totally miss it, maybe that is why OPK's never worked for me!!! Maybe that is why the CBEFM didn't work the 1st month either!!!

Re: if you are unsure of when to start OPK's.. take a look here!!